Oil-burning steam-boiler.



C. A. HAMMBL.

OIL BURNING STEAM BOILER. APPLIUATION FILED AUG. 4, 1909.

Patented C. 18, 1910 ms Nanius Patins zo., xJ/Asumarau, o4 c.

OIL-BURNING STEAM-BOILER.

Specification of Letters Patent.

Patented Oct. 18, 191).

Application filed August 4, 1909. Serial No. 511,079.

To all whom it may concern:

Be it lrnown that I, CHARLES A. HAMMEL, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Oil-Burning Steam-Boilers, of which the following is a specification.

My invention has relation to constructive improvements in that type of boilers, such as are illustrated and described in my United States Letters Patent No. 882,756 entitled oil burning steam boilers, and granted to me on the 211th day of March, 1908.

In the above described patent the hydrocarbon burners were oppositely disposed as in this construction, but no provision was made whereby a single burner could be operated to its maximum capacity without injury to the iirebox or to its oppositely disposed burner.

It is an object of this present invention to provide constructive improvements, whereby a single burner may be operated to its fullest capacity without injury to the irebox or to the other burner that is disposed therein, and at the same time to provide for carelessness of operators who may accidentally turn o the fuel supply to one burner while the other is operating at its fullest capacity.

Another object is to provide a construction in which each burner flame is provided with an independent air admission means, thus enabling an operator to effectively regulate and control the amount of air being fed to the ames.

Another object is to provide a novel disposition of the burners, so that they will not be affected by the heat of the lirebox when the burners are in operation.

A further object is to provide a flame defiecting or impinging wall, whereby I am enabled to decrease the length of the usual irebox and thus attain practically perfect combustion.

In the attainment of the above objects I preferably employ a pair of oppositely disposed hydrocarbon burners located at either end of the firebox, preferably outside thereof, the lirebox being lined with a refractory material and provided with a flame dcfiecting or impinging wall, which is designed to protect one of the burners when the other' is operating at its fullest capacity. Provision is also made for admitting air directly to the burners, as well as a separate air supply for each burner flame.

In the annexed drawings forming a part of this specification, Figure 1 is a central longitudinal section through the lirebox of a locomotive boiler, illustrating an application of my invention. Fig. 2- is a transverse view taken on line 2-2 of Fig. 1.

Referring more specifically to the drawings, the inside firebox of combustion chamber 5 is of usual construction, being closed at the top by a crown sheet 6 and surrounded by water jackets 7, the bottoms of which are closed by the usual mud ring 8. The outside shell 9 of the chamber 5 is connected to the waist 10, through which the tubes 11 pass from sheet 12 to the smoke stack (not shown) at the front end of the boiler.

Chamber' 5 is closed at the bottom by a sheet or plate metal box 18, and corresponds in general form to the ash pan of locomotive boilers in which fuel of a solid type is consumed.

Box 13 is provided with a metallic bottom plate 14 which extends from the rear end of the firebox forwardly approximately two thirds of the length thereof, where it is bolted or otherwise secured to a vertically disposed plate 15 which extends upwardly from plat-c lst and forms a deflecting or flame impinging wall 16. Plate 17 which is bolted or otherwise secured to vertical plate 15 forms a closure for that part of the lirebox that lies beyond plate 1st. Plates 14C and 17 are provided with rectangular openings 18, 19, over which are mounted perforated castings 20 and 21, the upper faces of these castings lio flush with the top faces of the lire brick 22 with which. the box 13 is preferably lined.

Bolted or otherwise secured to the under face of plates 14 and 17 are sheetmetal air inlet boxes 28, 2a, the rear vertical wall of each box being open to the atmosphere, and each provided with a damper 25, controlled from the cab of the engine in a suitable manner (not shown). By means of these air inlet boxes the admission of air through the perforated castings into the lircbox may be satisfactorily and eihciently controlled. This method of taking the main air supply from the bottom through perforated cast.- ings is essentially the same in all respects as that construction described and illus- (rated in my heretofore mentioned patent, it preventing, as in that construction, the entrance of an excessive or undue amount of cold air to the combustion chamber, and at the same time retards the volume of air entering thereinto and enables the fireman of the locomotive to control the admission of air to the combustion chamber most effectively. The air as it enters through the perforations becomes highly heated from the operation of the burners and expands, so that it will readily form a union with the gases that are being consumed within the combustion chamber. The entrance of air through the perforations in the bottom plates also tends to raise the burner flames and prevents dragging.

It will be noted by an inspection of Fig. l of the drawings that the bulk of the air admitted to the combustion chamber is through inlet box 23, the inlet box 24 disposed under the flame projected by the forward burner being barely sufficient to supply that flame with the requisite amount of oxygen to start combustion.

In my former patent, heretofore mentioned, the hydrocarbon burners were oppositely disposed projecting their flame toward `each other when operating simuli taneously. While this construction has been found to be entirely practical, yet if an operator should accidentally shut olf the fuel supply to one of the burners 26, 27 when they were both operating at their maximum capacity, the intense flame projected by the remaining burner would destroy the oppositely disposed burner, and oftentimes injure the firebox. By means of the present construction the deflecting wall 16 will effectually prevent accidents of this sort, and one or the other of the burners may be operated independently at its maximum capacity without injury to the other burner. The air supplied directly to the burner flames is admitted through openings 28, 29, as in my former patent. It will also be observed that by the provision of this deflecting wall, and by locating it transversely of the firebox and approximately two-thirds the distance from the front, that the forward burner 27 will act as an auxiliary to burner 26, the operator being able to control the burner to suitthe conditions under which the locomotive is operating'.

Having described my invention what I j claim as new and desire to secure by Letters Patent is l. The combination with a steam boiler having a firebox, of means for delivering hydrocarbon flames from the front and rear of the firebox toward each other into the firebox, means for establishing a draft of air into the firebox adjacent the flame delivery means, a plurality of means for admitting air directly into the firebox below t-he flames, one of said means for each burner flame, and means located beneath each of said air admission means for controlling the volume of air to said admission means.

2. The combination with a steam boiler having a firebox provided with a transversely disposed flame deflecting wall, of means for delivering hydrocarbon flames from the front and rear of the firebox toward each other into the firebox, means for establishing a draft of air into the firebox adjacent the flame delivery means, a plurality of means for admitting air directly into the firebox below and directly under the llames, one of said means for each burner flame, and means located beneath each of said air admission means for controlling the volume of air to said admissionineans.

3. The combination with a steam boiler, of a firebox having a refractory lining on its bottom' and sides, the bottom of said firebox being constructed so as to form a transversely disposed flame deflecting wall, of oppositely disposed hydrocarbon burners located at the front and rear end of the firebox, said burners being disposed in different horizontal planes and discharging their flames toward each other, the flame of one burner impinging against said deflecting wall, means for establishing a draft of air into the firebox adjacent the hydrocarbon burners, a plurality of air inlets in the bottom of said firebox, a metallic casing having an opening therein disposed under each of said air inlet-s, a closure for the opening in each casing, and means to control the closures.

In witness that I claim the foregoing I have hereunto subscribed my name this 27th day of July, 1909.

C. A. HAWMEL.

lVitnesses EDMUND A. STRAUSE, MYRTLE A. PALMER. 

